Dust-remover for threshing-machines



" WITNESSES C. E. HAGEN.

DUST REMOVER FOR THRESHING MACHIIJES.

APPLICATION FILED H58. 7, 1920. 1568 1409 Patented Feb. 8,1921.

2 SHEETSSHEET I.

INVENTOR ATI'ORNEY C. E. HAGEN.

DUST REMOVER FOR THRESHING MACHINES APPu'cATmm FILED ma 7, 292.0.

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" CARL EDWARD HAGEN, or rnnronn nnrrns, MINNESOTA.

DUST-REMO'Yi'ER E018, THRESHING-MAGH-INES.

T all whom it may concern.

Be it known that I, CARL EDWARD HAcnN, a citizen of the United States, residing at Pelican Rapids, in the county of jOttertail and State of Minnesota, have invented a new and'useful Dust-Remover for Threshing-Machines, of which the following 18 a specification. i

This invention has reterencetodust removers for threshing machines, and itsobject is to remove the dust from the space or chamber occupied by the hand cutters and from the portion oi the nrachine immediately back oi the grain canvas apron to. the rear of the threshing cylinder.

In accordance with the invention, the threshing machine is provided with a pipe or tube connected with the casing between the band cutters and the cylinder, which pipe is carried along the casing to an intermediate portion or" the length of the latter to a point a short d1stance to the rear of the canvas apron provided inmany thresh machines and ultimately communicates with the air intake oi the, customary suction blower at the rear of the machine so that there 1s produced a suitable drait through the pipe withdrawlng the dust-laden. air

from points in the machine where the dust is liable to become very thick. Such dust released from the grain by the band cutters and threshing cylinder is both annoying and injurious to the operator feeding the bundles to the threshing cylinder, but by means of the invention the injurious effects upon the operator are eliminated and the grain is de livered in cleaner condition than is usual.

The invention will be best understood from a consideration of the following de tailed description taken in connection with the accompanying drawings forming part of this specification, with the understanding, however, that the invention is not confined to any strict conformity with the showing in the drawings, but may be changed and modified so long as such changes and modifications mar: no material departure from the salient features of the invention as expressed in the appended claims.

In the drawings,

Figure 1 is an elevation of a threshing machine equipped with the invention, certain parts being broken away and in section.

Fig. 52 is a perspective view of the pipe or duct embodying the invention and constitut- Specification of Letters Patent. Patented Feb. 8, 192 1. Application filed February 7, 1920. Serial No. 356,313. i V I *ig. 3 is a section onithe line 8 3 of Fig. 4 is a section on theline of Fig. 1. r I

Fig. 5 is a perspectiveview of the for ward end of the suction duct shown in Fig; 2, withthe point of view below the bottom of the duct. I i

Beferringto the drawings, there is shown a threshing machine 1 which may be of any suitable type but is not described in detail since the specific construction of the machine forms no part of the invention. l

At the forward end of the threshing machine, which is suitably incased, there is a chamber 2 traversediby a shaft 3 upon which are mounted a suitable number of band cut-1 ters 4:, all of which may be ofordlnary con struction. Withinthe casingofthe threshmg machine; it may be assumed that the usual threshingcylinder is installed but this has not been shown in the drawings. E tending across the top of the casing over the chamber 2 is a dust-collecting nozzle 5 having a longitudinaliopeningor mouth 6 with flanges 7 on opposite sides, whereby the mouth 6 may be made to fit over an opening 8 extending crosswise of the chamber 2. The

nozzle 5 tapers from one end toward the where it is connected by other elbows 11 12 and 13 and pipe SBCiJlODSll, 15 and 16 to the air intalrc or a suction {an 17 of any approved form near the rear end or the ma chine and delivering air into a pneumatic staclrerlS of ordinary construction.

The pipe 9, at an intermediatepoint, has a branch 19 leading into the interior oithe casing or". the machine at a point a few inches back of a canvas apron 20 within the casing, with which certain types or". threshing machines are customarily provided.

The suction fan 1'? is driven in any suitable manner from the driving power unit of a thresher and creates a suction draft through the pipe 9 and its continuations and adjuncts, thereby drawing air through the branch pipe 19 and throughthe nozzle 5, so that dust-laden air is withdrawn conres stantly from the interior of thecasing of the machine back of the, canvas 20 and through the mouth 6 of-the nozzle between the band cutters 14: and the threshing cylinder,

Whereby'the chamber'2,ordinarily heavily dust-laden because of the action of the band cutters Y4: and the threshing cylinder, is kept relatively,freefrom dustj, Because of such conditions, an operator" feeding "oundles of grain tothe threshing cylinder is I not subjected to the effectsbf clouds of dust issuing from the feeding end of the machine and consequently is freed from the harmful V 1 efiects'of such dust. Moreover, theinterior of the machine is lrept'marl-zedly free from dust heretofore dischargedfrom the bundles of grain and from the straw, so that the grainwhen separated from the straw isdeli ered in a markedly clean condition,

The invention, therefore, contributes to the 2. The combinatlon with, a threshing ma} chine, of a duct having atone end a' suction fan to cause astream of air through the duct and at the other end a nozzle communieating with the interior of the machine to the rear of the band cutters and extending transverselyof the machine, said duct. having a branch pipe entering the interior of the machine adjacent and to the rear of the canvas apron loc'ated within the casing of the machine.

The combination with a tlnfeshing machine, of a pipe or duct communicating with the interior of the machine at the rear :of and adjacent to the band cutters thereof and extending therefromto the rear of the machine at a low point thereof, and a suction fan connected to the. duct at said low point for causing a stream of'air to flow through the duct from the front end portion of the machine adjacent to the band cutters.

4. The combination'witha threshing machine, of a pipe or duct communicating with the interior of the machineat the rear of and adjacent to the band cutters thereof and extending therefrom to the rear of the machine at al'ow point thereof, means for caus I ing a stream of air to flow through the duct from the front end portion of the machine adjacent to the band cutters, said pipe havmg a forward nozzle communlcatlng therewith and tapering away from the pipe with the outer end closed, and an open mouth at i the bottom of the nozzle communicating throughout its length with the interior of the machine adjacent to the band cutters.

is 5. The combinationwith a threshing ma chine provided with band cutters, of a suc tlon pipe having a forward nozzle extremity con'lmunicati ng with the interior of the machine adjacent and to the rear of the band cutters, the nozzle extremity being closed at the outer end and tapering theretoward'and and having a longitudinal mouth with side flanges for attachment to the casing of the ma chine, said nozzle extending transversely of the machine from one side to the other for the width of the space occupied by the band cutters.

6. In a threshing machine, a suction duct having a nozzle or mouth end communicat- 7 ing with the band-cutter chamber of the machine throughout the breadth thereof whereby the dust discharged from the material being treated by the cutting of the bands and the threshing of the grain is withdrawn from the neighborhood of the feeding end of the machine through said suction duct. i v

7. The combination with a threshing machine having band cutters and a pneumatic stacker, and a suction fan at the rear end delivering air to said stacker, of a pipe arrangedlongitudinally along the outside of the machine from the band cutters to the fan, and having its rear end communicating with the inlet of said fan, and a dust collect mg nozzle at the front end of theplpe, said nozzle being arranged transversely of the machine in rear of the band cutters with its mouth facing the interior thereof.

V In testimony that I claim the foregoing as my own I have heretoafiixed my signature.

CARL. EDT/YARD HAGEN, 

